Han Xianmina,b and Li Wenjianga,*
aSchool of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, China
bHebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mine, Shijiazhuang, China
This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The pipe screen structure proposed in this paper is a closed underground steel pipe and reinforced concrete combined structure including 20 steel pipes. The pipe screen - structure method (PSM) mainly includes three construction stages such as steel pipe jacking, steel pipe cutting and concrete pouring, and earth excavation. The surface settlement and structural stress characteristics in the pipe screen structure method's construction process are investigated in this paper using numerical calculations and field tests. The research results show that the pipe curtain structure method can effectively reduce the surface subsidence caused by construction, and the settlement induced in the first stage is the largest, followed by the second stage. The buried pipe curtain structure bears less load according to the measured data. The stress concentration at the connection positions between the steel pipe and the steel plate is noticeable during the steel pipe cutting process. The steel pipe support column mainly bears the pressure, and its bending moment is small. The main reinforced concrete structure is less stressed, and the structural parameters can be further optimized
Keywords: Steel pipe, Reinforced concrete, Surface settlement, Structural stress
2022; 23(5): 716-724
Published on Oct 31, 2022
School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, China
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